CN102598099A - Plasma display panel driving method and plasma display device - Google Patents
Plasma display panel driving method and plasma display device Download PDFInfo
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- CN102598099A CN102598099A CN2010800487811A CN201080048781A CN102598099A CN 102598099 A CN102598099 A CN 102598099A CN 2010800487811 A CN2010800487811 A CN 2010800487811A CN 201080048781 A CN201080048781 A CN 201080048781A CN 102598099 A CN102598099 A CN 102598099A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
- G09G3/292—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
- G09G3/2927—Details of initialising
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
- G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
- G09G3/2946—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by introducing variations of the frequency of sustain pulses within a frame or non-proportional variations of the number of sustain pulses in each subfield
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
- G09G3/2965—Driving circuits for producing the waveforms applied to the driving electrodes using inductors for energy recovery
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
A high-quality image is displayed on a plasma display panel while generating a stable write discharge and maintaining a sufficient voltage setting margin. To this end, during the selective initialization operation, a first voltage is applied to a sustain electrode and a rising ramp waveform voltage is applied to a scanning electrode in order to generate a first discharge with the sustain electrode acting as a cathode and the scanning electrode acting as an anode; a falling ramp waveform voltage is applied to a scanning electrode in order to generate a second discharge with the scanning electrode acting as a cathode and the data electrode acting as an anode; a positive rectangular waveform voltage is applied to a scanning electrode in order to generate a third discharge with the sustain electrode acting as a cathode and the scanning electrode acting as an anode; and a second voltage higher than the first voltage is applied to a sustain electrode and a falling ramp waveform voltage is applied to a scanning electrode in order to generate a fourth discharge with the scanning electrode acting as a cathode and the data electrode acting as an anode. Further, the duration during which the positive rectangular waveform is applied to a scanning electrode varies on the basis of the number of sustain pulses generated during the sustain period of the immediately preceding subfield.
Description
Technical field
The present invention relates to exchange the driving method and the plasma display system of the Plasmia indicating panel of surface discharge type.
Background technology
About being the interchange surface discharge type panel of representative with Plasmia indicating panel (following omission note do " panel "); With front substrate and the back substrate arranged opposite that has formed a plurality of data electrodes; Wherein the front substrate formed a plurality of by a pair of scan electrode with to keep the show electrode that electrode constitutes right, between front substrate and back substrate, formed a plurality of discharge cells.And in discharge cell, make it to produce ultraviolet ray through gas discharge, carry out the colour demonstration through this ultraviolet ray exited fluorophor that sends redness, green and blue shades of colour light.
Carry out method of driving as counter plate, the general son method that adopts wherein is divided on the basis of many sub-field during with a field (field), carries out through the combination of luminous son that gray scale shows.During each son field has an initialization, write during and keep during.
During initialization, produce the initialization discharge, carry out initialization action, be formed on necessary wall electric charge in the write activity that next carries out.About initialization action; Exist and force initialization action and select initialization action; Wherein force the action of the son of initialization action before just how all to make the initialization discharge generation, select initialization action just only to carry out in the son before just writing in the discharge cell of discharge and just make the initialization discharge generation.
During writing, optionally produce by discharge cell according to institute's images displayed and to write discharge and to form the wall electric charge.
Then, during keeping in, to scan electrode with keep electrode and alternately apply and keep pulse and produce and keep discharge, show through the luminous image that carries out of the luminescent coating that makes corresponding discharge cell.It is luminous for showing relevant luminously with gray scale that this keeps the caused luminescent coating of discharge, follows force initialization action luminous for showing irrelevant luminous with gray scale.
A kind of as son method studying and reducing the brightness (following omission is designated as " black brightness ") that shows when minimum gray scale is black, does one's utmost to reduce to show irrelevant luminous and driving method that contrast is improved with gray scale.For example in patent documentation 1, disclose the number of times that in a field, will force initialization action and be made as 1 time, in other son fields, selected the driving method of initialization action.In forcing initialization action, adopt the tilt waveform voltage that changes lentamente to carry out initialization action.
In addition, in patent documentation 2, disclose and at last scan electrode has been applied the updip waveform voltage during keeping, scan electrode has been applied the driving method that the waveform voltage that has a down dip is selected initialization action in during its next initialization.
As putting down in writing in the patent documentation 2; If driving voltage waveform is adopted tilt waveform voltage; Then distortion such as the waveform of ring etc. is suppressed, and therefore can apply driving voltage waveform to each electrode of each discharge cell accurately, can produce the stable discharge that writes.
But; The discharge that produces through tilt waveform voltage is faint discharge; In addition for select initialization can the voltage range that each electrode applies be limited, therefore have the problem that is difficult to produce the discharge that the experience of the wall electric charge of the discharge cell before is just fully eliminated.So, different on drive condition between the discharge cell that has carried out writing the discharge cell of discharge and not writing discharge in the son before just, its result, the problem that exists the voltage setting range (margin) of driving voltage waveform to narrow down.
[prior art document]
[patent documentation]
[patent documentation 1] TOHKEMY 2000-242224 communique
[patent documentation 2] TOHKEMY 2008-256774 communique
Summary of the invention
The present invention is a kind of driving method of panel; Adopt a plurality of have an initialization during, write during and keep during the son field constitute a field; Panel to possessing a plurality of discharge cells drives, and this discharge cell has scan electrode, keeps electrode and data electrode.During the initialization of son field; Force initialization action or select any initialization action in the initialization action; Wherein how the action of the son of this pressure initialization action before just all makes discharge cell produce the initialization discharge; This selection initialization action only makes and has produced the discharge cell that writes discharge during the writing of son before just and optionally produce the initialization discharge, in selecting initialization action, applies the 1st voltage to keeping electrode; And scan electrode is applied the waveform voltage that is inclined upwardly, and producing to keep electrode is that negative electrode, scan electrode are the discharge first time of anode.Then, scan electrode is applied downward-sloping waveform voltage, producing with the scan electrode is that negative electrode, data electrode are the discharge second time of anode.Then, scan electrode is applied positive square waveform voltage, producing to keep electrode is that negative electrode, scan electrode are the discharge for the third time of anode.Then, apply 2nd voltage higher than the 1st voltage to keeping electrode, and scan electrode is applied downward-sloping waveform voltage, producing with the scan electrode is that negative electrode, data electrode are the 4th discharge of anode.And the number of keeping pulse that is produced during the keeping of the son before being based on just changes the time span that scan electrode is applied positive square waveform voltage.
Through this method, can realize guaranteeing sufficient voltage setting range, and produce the stable discharge that writes, the plasma display system that the high image of display quality is shown.
In addition, the present invention is a kind of plasma display system, possesses: possess the panel of a plurality of discharge cells, this discharge cell has scan electrode, keeps electrode and data electrode; With adopt a plurality of have an initialization during, write during and keep during son constitute the driving circuit that the field comes counter plate to drive.Driving circuit is during the initialization of son field; Force initialization action or select any initialization action in the initialization action; How the action of the son of this pressure initialization action before just all makes discharge cell produce the initialization discharge, and this selections initialization action only makes and produced the discharge cell that writes discharge during the writing of son before just and optionally produce initialization and discharge.In selecting initialization action, apply the 1st voltage to keeping electrode, and scan electrode is applied the waveform voltage that is inclined upwardly, producing to keep electrode is that negative electrode, scan electrode are the discharge first time of anode.Then, scan electrode is applied downward-sloping waveform voltage, producing with the scan electrode is that negative electrode, data electrode are the discharge second time of anode.Then, scan electrode is applied positive square waveform voltage, producing to keep electrode is that negative electrode, scan electrode are the discharge for the third time of anode.Then, apply 2nd voltage higher than the 1st voltage to keeping electrode, and scan electrode is applied downward-sloping waveform voltage, producing with the scan electrode is that negative electrode, data electrode are the 4th discharge of anode.And the number of keeping pulse that is produced during the keeping of the son before being based on just changes the time span that scan electrode is applied positive square waveform voltage.
Thus, can realize guaranteeing sufficient voltage setting range, produce the stable discharge that writes, the plasma display system that the high image of display quality is shown.
Description of drawings
Fig. 1 is the exploded perspective view of employed panel in the plasma display system in the embodiment of the present invention.
Fig. 2 is the electrode spread figure of employed panel in the plasma display system in the embodiment of the present invention.
The driving voltage waveform figure that Fig. 3 applies for each electrode to the plasma display system in the embodiment of the present invention.
Fig. 4 A in embodiments of the present invention selection initialization of expression during in square waveform voltage application time that scan electrode is applied length and in order to produce the stable figure that writes the relation between the needed voltage Va of discharge.
Fig. 4 B is illustrated in the number of keeping pulse that produced during keeping and in order to produce the stable figure that writes the relation between the needed voltage Va of discharge.
Fig. 4 C is the figure of the example of the time T e that by each son field set of expression in the embodiment of the present invention.
Fig. 5 is the circuit module figure of the plasma display system in the embodiment of the present invention.
Fig. 6 is the circuit diagram of the scan electrode driving circuit of the plasma display system in the embodiment of the present invention.
Fig. 7 is the circuit diagram of keeping electrode drive circuit of the plasma display system in the embodiment of the present invention.
Embodiment
Below, adopt accompanying drawing that the plasma display system in the embodiment of the present invention is described.
(embodiment)
Fig. 1 is the exploded perspective view of employed panel 10 in the plasma display system in embodiments of the present invention.On the front of glass substrate 21, form a plurality of by scan electrode 22 with keep show electrode that electrode 23 constitutes to 24.And form dielectric layer 25 according to covering the mode of show electrode to 24, on this dielectric layer 25, form protective seam 26.In order to be easy to generate discharge, it is that magnesium oxide forms that protective seam 26 adopts the high material of electronics release performance.Form a plurality of data electrodes 32 overleaf on the substrate 31, form dielectric layer 33 according to the mode of covers data electrode 32, and then form the next door 34 of well word shape above that.And, the luminescent coating 35 send redness, green and blue shades of colour light is set on the side of next door 34 and the dielectric layer 33.
These front substrates 21 and the mode subtend configuration of back substrate 31 with the small discharge space of clamping so that show electrode intersects with data electrode 32 to 24, seal its peripheral part through encapsulants such as frits.And at discharge space, the mixed gas of enclosing for example neon and xenon is as discharge gas.Discharge space is divided into a plurality of zones through next door 34, at show electrode 24 parts that intersect with data electrode 32 is formed discharge cell.Thereby and through discharge by these discharge cells, luminous display image.
In addition, the structure of panel 10 not necessarily is defined in said structure, for example also can possess the next door of striated.
Fig. 2 is the electrode spread figure of employed panel 10 in the plasma display system in the embodiment of the present invention.In the panel 10; Follow direction and arrange long n root scan electrode SC1～scan electrode SCn (scan electrode 22 of Fig. 1) and n root and keep electrode SU1～keep electrode SUn (Fig. 1 keep electrode 23), arrange long m single data electrode D1～data electrode Dm (data electrode 32 of Fig. 1) along column direction.And, 1 couple of scan electrode SCi (i=1～n) and keep electrode Sui and data electrode Dj (part of j=1～m) intersect forms discharge cell, and discharge cell forms m * n in discharge space.
Next, driving voltage waveform and the action thereof that is used to drive panel 10 described.Plasma display system through son method, be about to a field (F) and be divided into many sub-field, luminous non-luminously come display image by what control each discharge cell in every sub-field (SF).
During each sub-field (SF) has an initialization, write during, keep during.
During initialization, eliminate the course of the wall electric charge of discharge cell before this, carry out initialization action, promptly on each electrode, be formed on the ensuing needed wall electric charge in the discharge that writes.
During writing, in discharge cell that should be luminous, selectively produce and write discharge, form the write activity of wall electric charge.
During keeping, to show electrode to 24 pulses of keeping that alternately apply with the corresponding number of luminance weights that is predetermined by every sub-field.Thus, produce and to keep discharge having produced the discharge cell that writes discharge, make this discharge cell luminous keep action.In addition, in order luminosity to be suppressed for lower, also can be provided with to omit the son field during keeping.
In this embodiment, for example 1 field by ten sub-field (SF1, SF2 ..., SF10) constitute, in each son, set the luminance weights of (1,2,3,6,11,18,30,44,60,80) respectively.And, force initialization action during being located at the initialization of son SF1, during the initialization of a son SF2～son field SF10, select initialization action.But the formation of son of the present invention field is not limited to above-mentioned son (sub field) number and luminance weights.
The driving voltage waveform figure that Fig. 3 applies for each electrode to the plasma display system in the embodiment of the present invention.
First half during the initialization of son the SF1 that forces initialization action applies voltage 0 (V) to data electrode D1～data electrode Dm, to keeping electrode SU1～keep electrode Sun also to apply voltage 0 (V).And, scan electrode SC1～scan electrode SCn is applied the waveform voltage that is inclined upwardly that slowly rises towards voltage Vi2 from voltage Vi1.Voltage Vi1 is the voltage of keeping below the corresponding discharge ionization voltage of electrode SU1～keep electrode Sun, and voltage Vi2 keeps electrode SU1～the keep voltage of the corresponding discharge ionization voltage of electrode Sun for surpassing.
Thus; Scan electrode SC1～scan electrode SCn and keep electrode SU1～keep between the electrode Sun and scan electrode SC1～SCn and data electrode D1～data electrode Dm between produce faint initialization discharge respectively; On scan electrode SC1～scan electrode SCn, accumulate negative wall voltage, on data electrode D1～data electrode Dm and keep electrode SU1～keep and accumulate positive wall voltage on the electrode SUn.At this, the wall voltage on the so-called electrode represent through on the dielectric layer of coated electrode, on the protective seam, the voltage that produces of the first-class wall electric charge of accumulating of luminescent coating.
Latter half during initialization to keeping electrode SU1～keep electrode Sun to apply voltage Ve, applies the downward-sloping waveform voltage that gently descends towards voltage Vi4 from voltage Vi3 to scan electrode SC1～scan electrode SCn.Voltage Vi3 is for becoming the voltage below the discharge ionization voltage with respect to keeping electrode SU1～keep electrode Sun, and voltage Vi4 is for respect to keeping electrode SU1～the keep voltage that electrode Sun surpasses discharge ionization voltage.
Thus, scan electrode SC1～scan electrode SCn and keep electrode SU1～keep between the electrode Sun and scan electrode SC1～scan electrode SCn and data electrode D1～data electrode Dm between produce faint initialization discharge once more.Afterwards; Negative wall voltage on scan electrode SC1～scan electrode SCn and the positive wall voltage of keeping electrode SU1～keep on the electrode SUn are weakened; Part superfluous in the positive wall voltage on data electrode D1～data electrode Dm is discharged, and is adjusted to the wall voltage that is suitable for write activity.Through more than, accomplish the pressure initialization action that produces the initialization discharge at whole discharge cells.
Next in during writing, data electrode D1～data electrode Dm is applied voltage 0 (V), apply voltage Ve, scan electrode SC1～scan electrode SCn is applied voltage Vc keeping electrode SU1～Sun.
Next, the scan electrode SC1 of first row is applied the scanning impulse of negative voltage Va, and to applying the pulse that writes of positive voltage Vd with making the luminous corresponding data electrode Dk of discharge cell of first row among data electrode D1～data electrode Dm.Thus; The data electrode Dk that has applied the discharge cell that writes pulse go up and scan electrode SC1 on the voltage difference of cross part; Income value after becoming poor (Vd-Va) that the outside is applied voltage and having added the positive wall voltage on the data electrode Dk surpasses discharge ionization voltage.Afterwards, between data electrode Dk and scan electrode SC1, produce discharge, this discharge expands at scan electrode SC1 and keeps the discharge between the electrode SU1.Produce thus and write discharge.Afterwards, on scan electrode SC1, accumulate positive wall voltage, accumulate negative wall voltage on the electrode SU1 keeping, on data electrode Dk, also accumulate negative wall voltage.As above such, in should making the luminous discharge cell of first row, produce and write discharge, carry out on each electrode, accumulating the write activity of wall voltage.On the other hand, do not apply the voltage of the data electrode 32 that writes pulse and the cross part between the scan electrode SC1, therefore do not produce and write discharge owing to surpass discharge ionization voltage.
Next, the scan electrode SC2 of second row is applied scanning impulse, and to applying and write pulse with making the luminous corresponding data electrode Dk of discharge cell of second row among data electrode D1～data electrode Dm.Thus; Between data electrode Dk and the scan electrode SC2 and keep between electrode SU2 and the scan electrode SC2 to produce and write discharge; On scan electrode SC2, accumulate positive wall voltage, accumulate negative wall voltage on the electrode SU2 keeping, on data electrode Dk, also accumulate negative wall voltage.As above such, in should making the luminous discharge cell of second row, produce and write discharge, carry out on each electrode, accumulating the write activity of wall voltage.On the other hand, do not apply the voltage of the data electrode 32 that writes pulse and the cross part between the scan electrode SC2, therefore do not produce and write discharge owing to surpass discharge ionization voltage.
Below, from the scan electrode SC3 of the third line to the capable scan electrode SCn of n till, carry out same write activity, in discharge cell, form the ensuing needed wall electric charge of discharge of keeping.
During ensuing keeping, to keeping electrode SU1～keep electrode Sun to apply voltage 0 (V), and scan electrode SC1～scan electrode SCn is applied the pulse of keeping of voltage Vs.Thus; In having caused the discharge cell that writes discharge; Scan electrode SCi goes up and keeps the voltage difference on the electrode SUi; Become voltage Vs is added wall voltage and the income value of keeping after the difference of the wall voltage on the electrode SUi on the scan electrode SCi, surpass scan electrode SCi and keep the discharge ionization voltage between the electrode Sui.Thus, at scan electrode SCi with keep between the electrode Sui to produce and keep discharge, luminescent coating 35 is luminous through the ultraviolet ray that produces this moment.Afterwards, on scan electrode SCi, accumulate negative wall voltage, accumulate positive wall voltage on the electrode SUi keeping.And then, on data electrode Dk, also accumulate positive wall voltage.The opposing party does not produce in not causing the discharge cell that writes discharge and keeps discharge, guarantees the wall voltage when initialization action finishes.
Next, scan electrode SC1～scan electrode SCn is applied voltage 0 (V), and to keeping the pulse of keeping that electrode SU1～Sun applies voltage Vs.Thus, cause once more in having caused the discharge cell of keeping discharge and keep discharge that luminescent coating 35 carries out luminous.Afterwards, accumulate negative wall voltage on the electrode SUi keeping, on scan electrode SCi, accumulate positive wall voltage.
Below same, will alternately put on scan electrode SC1～scan electrode SCn and keep electrode SU1～keep electrode Sun with the pulse of keeping of the corresponding number of luminance weights, in having caused the discharge cell that writes discharge, make and keeping discharge and continue to produce.
Next, during the initialization of son SF2, to keeping electrode SU1～keep electrode Sun to apply voltage 0 (V), and scan electrode SC1～scan electrode SCn applied the waveform voltage that is inclined upwardly that slowly rises to till the voltage Vr as the 1st voltage.Thus; Produced the discharge cell of keeping discharge during the keeping of son before just (being a son SF1) (under the situation of a son during not keeping at this; During writing, carried out writing the discharge cell of discharge) in; Generation is established and kept electrode Sui is negative electrode, and scan electrode SCi is the discharge first time of anode.This discharge is faint discharge.And the wall voltage that scan electrode SCi goes up and keeps on the electrode SUi is weakened.In addition, in this embodiment, voltage Vr is set to the voltage identical with voltage Vs, but voltage Vr also can be the different voltages with different with voltage Vs.
Next, to keeping under the state that electrode SU1～keep electrode Sun applied voltage 0 (V), scan electrode SC1～scan electrode SCn is applied the downward-sloping waveform voltage that gently descends towards voltage Vi4 from voltage 0 (V).Thus, in the discharge cell that has produced the faint discharge first time, produce faint discharge once more.The faint discharge of this moment is a negative electrode for establishing scan electrode SCi, and data electrode Dk is the discharge second time of anode.In addition, in this embodiment, voltage Vi4 is set to the voltage Va of scanning impulse and equates or the voltage higher a little than voltage Va.
Afterwards, scan electrode SC1～scan electrode SCn is applied positive square waveform voltage, in this embodiment, during time T e, apply the square waveform voltage of voltage Vr.Be so-called time T e for during selecting initialization to the length of the positive square waveform voltage application time that scan electrode SC1～scan electrode SCn applies.
Thus, in the discharge cell that has produced the faint discharge second time, produce discharge for the third time.To keep electrode Sui be negative electrode in order to establish in the discharge of this moment, and scan electrode SCi is the discharge for the third time of anode, is more weak discharge.
And then after this, apply than the 2nd high voltage of the 1st voltage (0 (V)) to be voltage Ve, scan electrode SC1～scan electrode SCn to be applied the downward-sloping waveform voltage that gently descends towards voltage Vi4 from voltage 0 (V) to keeping electrode SU1～keep electrode Sun.Thus, in having produced the discharge cell that discharges for the third time, produce the 4th discharge.The discharge of this moment is a negative electrode for establishing scan electrode SCi, and data electrode Dk is the 4th discharge of anode.And, through this faint discharge, the wall voltage on the scan electrode SCi, keep part superfluous in wall voltage and the wall voltage on the data electrode Dk on the electrode SUi and discharged, be adjusted to the wall voltage that is suitable for write activity.As above such, the initialization action of a son SF2 finishes.This initialization action; It is the selection initialization action that the discharge cell that carried out keeping action in during the keeping of the son before just (under the situation of a son during not keeping, having carried out the discharge cell of write activity in during writing) is optionally carried out the initialization discharge.
Next, the action during the writing of the action during the writing of son SF2 and a son SF1 is identical, and the action during the keeping of a son SF2 is except keeping umber of pulse, identical with the action during the keeping of son field SF1.In addition, the action among a son SF3～son SF10, except keeping umber of pulse, identical with the action of a son SF2.
In addition, in this embodiment, voltage Vi1 is 200 (V), and voltage Vi2 is 400 (V); Voltage Vi3 is 200 (V), and voltage Vi4 is-180 (V), and voltage Vc is 20 (V), and voltage Va is-200 (V); Voltage Vs is 200 (V), and voltage Vr is 200 (V), and voltage Ve is 150 (V), and voltage Vd is 60 (V).In addition, the degree of tilt of the waveform voltage that is inclined upwardly is set between 1～10 (the V/ μ sec), and the degree of tilt of downward-sloping waveform voltage is set between-1～-10 (the V/ μ sec).But each magnitude of voltage of the present invention is not limited to any of these magnitude of voltage.Preferred each magnitude of voltage waits according to the specification of the characteristic of panel or plasma display system and carries out optimal setting.
In addition, in this embodiment, the adjusted value of time T e for setting by every sub-field is set between 1 μ sec～500 μ sec.About stating after the relevant detailed content of time T e.
As above-mentioned, in this embodiment, during the initialization of selecting initialization action in, make it to produce and establish that to keep electrode Sui be negative electrode, scan electrode SCi is the discharge first time of anode.Next, make it to produce that to establish scan electrode SCi be negative electrode, data electrode Dk is the discharge second time of anode.Next, make it to produce and establish that to keep electrode Sui be negative electrode, scan electrode SCi is the discharge for the third time of anode.Next, make it to produce that to establish scan electrode SCi be negative electrode, data electrode Dk is the 4th discharge of anode.And; These discharges are produced as weak discharge; The luminous brightness that produces in order to suppress to follow this discharge to keeping electrode SU1～keep electrode Sun to apply the 1st voltage, and applies the waveform voltage that is inclined upwardly to scan electrode SC1～scan electrode SCn; Next scan electrode SC1～scan electrode SCn is applied downward-sloping waveform voltage; Next scan electrode SC1～scan electrode SCn is applied positive square waveform voltage,, and scan electrode SC1～scan electrode SCn is applied downward-sloping waveform voltage next to keeping electrode SU1～keep electrode Sun to apply the 2nd voltage higher than the 1st voltage.
Thus,, produce faint discharge through repeated multiple times and also can on each electrode, accumulate enough wall voltages, the ensuing discharge stability ground that writes is produced even do not produce strong discharge.
Fig. 4 A in embodiments of the present invention selection initialization of expression during in square waveform voltage application time that scan electrode SC1～scan electrode SCn is applied length and in order to produce the stable figure that writes the relation between the needed voltage Va of discharge.In Fig. 4 A; The longitudinal axis representes in order to produce the stable discharge needed voltage Va (amplitude of scanning impulse) that writes, and the length of the square waveform voltage application time that during transverse axis is illustrated in and selects during the initialization scan electrode SC1～scan electrode SCn is applied is time Te.
Fig. 4 B is illustrated in the number of keeping pulse that produces during keeping and in order to produce the figure of the stable relation that writes the needed voltage Va of discharge.In Fig. 4 B, the longitudinal axis representes in order to produce the stable discharge needed voltage Va (amplitude of scanning impulse) that writes, the number of keeping pulse that produces during the keeping of the son before transverse axis is illustrated in just.In addition, " 1 pair " shown in accompanying drawing expression at every turn to scan electrode 22 with keep electrode 23 and apply respectively and once keep pulse.
Fig. 4 C is the figure of the example of the time T e that presses every sub-field setting in the expression embodiment of the present invention.In addition, in Fig. 4 C expression by 8 sub-field (SF1, SF2 ..., SF8) constitute 1 field, the setting example of the time T e when each son field has been set the luminance weights of (1,2,4,8,16,32,64,128) respectively.This time T e is the length of the square waveform voltage application time of the voltage Vr that scan electrode SC1～scan electrode SCn applied in during selecting initialization.
In addition, in the accompanying drawing " μ sec " omitted note and make " μ s ".
Shown in Fig. 4 A, time expand Te then reduces in order to produce stable needed voltage Va (amplitude of the scanning impulse) this point of discharging that writes more more, has been confirmed by the present inventor.In the example shown in Fig. 4 A; Confirmed for example when time T e is set at 500 μ sec; Compare with time T e being made as 0 μ sec (promptly scan electrode SC1～scan electrode SCn not being applied square waveform voltage) time, can be with being reduced to about 20 (V) in order to produce the stable amplitude that writes the needed scanning impulse of discharge.
In addition, shown in Fig. 4 B, the number of keeping pulse that produces during the keeping of the son before just is many more, then becomes high more in order to produce the stable needed voltage Va of discharge (amplitude of scanning impulse) that writes, and this point is confirmed by the present inventor.In the example shown in Fig. 4 B; Confirmed to produce during the keeping of son before just during the writing of 400 pairs of sons of keeping pulse; With produce the writing of 1 pair of son of keeping pulse during the keeping of son before just during compare, stable write discharge and the amplitude of essential scanning impulse increases about 20 (V) in order to produce.
Hence one can see that; Produce the stable needed voltage Va (amplitude of scanning impulse) that discharges that writes in order to reduce; Needn't in all sons, all set time T e longer, as long as come setting-up time Te according to the number of keeping pulse that produces during the keeping of the son before just.If the number of keeping pulse that produces during the keeping of the son promptly before just is few, then, therefore can time T e be set at the relatively shorter time owing to produce the stable needed voltage Va of discharge (amplitude of scanning impulse) that writes and diminish.In addition, if the number of keeping pulse that produces during the keeping of the son just is many, then, therefore preferably time T e is set at the long time owing to uprise in order to produce the stable needed voltage Va of discharge (amplitude of scanning impulse) that writes.
At this, in this embodiment, come setting-up time Te according to the number of keeping pulse that produces during the keeping of the son before just.If the number of keeping pulse that produces during the keeping of the son promptly before just is little; Then time T e is set at the relatively shorter time; If the number of keeping pulse that produces during the keeping of the son before just is big, then time T e is set at the long time.
For example by 8 sub-field (SF1, SF2 ..., SF8) constitute 1 field; Each son field is set respectively under the situation of luminance weights (1,2,4,8,16,32,64,128); Son SF2 just before the luminance weights of son (a son SF1) be " 1 ", so the generation number of keeping pulse becomes minimum in 1 field.Thereby, in a son SF2, can time T e be set at minimum.In the example shown in Fig. 4 C, the time T e of a son SF2 is 15 μ sec.
In addition, the luminance weights of the son (son SF7) of son SF8 before just is " 64 ", and the generation number of keeping pulse becomes second largest number in 1 field.Therefore, in a son SF8, preferably time T e is set at maximum.In the example shown in Fig. 4 C, the time T e of a son SF8 is 300 μ sec.
In addition; In above-mentioned sub-field structure; The pulse number of keeping that in son SF8, produces becomes maximum in 1 field, but then the son of a son SF8 be a son SF1 of next, in the SF1 of son field, does not produce square waveform voltage in order to force initialization action.Therefore, in the example shown in Fig. 4 C, the setting value of the time T e of a son SF8 becomes maximum in 1 field.
In addition, in the example shown in Fig. 4 C, according to the number of keeping pulse that produces during the keeping of the son before just; Difference setting-up time Te in each son field; In a son SF3, establishing time T e is 20 μ sec, and in a son SF4, establishing time T e is 50 μ sec, and in a son SF5, establishing time T e is 50 μ sec; In a son SF6, establishing time T e is 100 μ sec, and in a son SF7, establishing time T e is 200 μ sec.
In addition, in the example shown in Fig. 4 C, though in son SF4 and a son SF5 during the keeping of the son before just the number of keeping pulse of generation different, all time T e is set at 50 μ sec.Thus; Even the number of keeping pulse that produces during the keeping of the son before just is different; When driving needed deficiency of time etc., consider the flash-over characteristic of panel or the specification of plasma display system etc. and time T e is set at the identical time long also it doesn't matter.
Thus, in this embodiment, come setting-up time Te according to the number of keeping pulse that produces during the keeping of the son before just.Promptly; If the number of keeping pulse that produces during the keeping of the son before just is little; Then time T e is set at the relatively short time,, then time T e is set at the long time if the number of keeping pulse that produces during the keeping of the son before just is many.Thus, can reduce in order to produce the stable needed voltage Va (amplitude of scanning impulse) that discharges that writes.Thus, can guarantee sufficient voltage setting range and produce the stable discharge that writes, can realize the plasma display system that image displaying quality is high.
Next, the driving circuit that is used to drive panel 10 is described.Fig. 5 is the circuit module figure of the plasma display system 40 in the embodiment of the present invention.Plasma display system 40 possesses: arrange a plurality of panels 10 that have scan electrode 22, keep the discharge cell of electrode 23 and data electrode 32; With the driving circuit that drives panel 10.Driving circuit possesses imaging signal processing circuit 41, data electrode driver circuit 42, scan electrode driving circuit 43, keeps electrode drive circuit 44, timing generation circuit 45 and the power circuit (not shown) of each circuit module being supplied with needed power supply.
Imaging signal processing circuit 41 distributes gray-scale value based on the picture signal of being imported to each discharge cell.And, each gray-scale value is transformed to the luminous non-luminous view data of representing every sub-field.
Timing generation circuit 45 produces the various timing signals that the action of each circuit module is controlled based on horizontal-drive signal and vertical synchronizing signal.And, the timing signal that is produced is offered circuit module respectively.
Data electrode driver circuit 42 is transformed to the view data of every sub-field with each of data electrode D1～data electrode Dm is corresponding and writes pulse.And, based on the timing signal that provides from timing generation circuit 45, each data electrode D1～data electrode Dm applied write pulse.
Scan electrode driving circuit 43 has the pulse-generating circuit of keeping, tilt waveform voltage generation circuit, scanning impulse generation circuit (not shown).The tilt waveform voltage generation circuit produces be inclined upwardly waveform voltage and the downward-sloping waveform voltage that scan electrode SC1～scan electrode SCn is applied during initialization.Keeping pulse-generating circuit produces during keeping and keeps pulse to what scan electrode SC1～scan electrode SCn applied.Scanning impulse produces circuit and possesses a plurality of scan electrode drive IC (scans I C), during writing, produces the scanning impulse to scan electrode SC1～scan electrode SCn applies.And scan electrode driving circuit 43 is based on the above-mentioned driving voltage waveform of the timing signal for generating that provides from timing generation circuit 45, and suitably imposes on each scan electrode SC1～scan electrode SCn respectively.
Keep electrode drive circuit 44 and possess the pulse-generating circuit of keeping (not shown),, and suitably impose on and keep electrode SU1～keep electrode Sun based on the above-mentioned driving voltage waveform of the timing signal for generating that provides from timing generation circuit 45.
Fig. 6 is the circuit diagram of the scan electrode driving circuit 43 of the plasma display system 40 in the embodiment of the present invention.Scan electrode driving circuit 43 possesses the pulse-generating circuit of keeping 50, tilt waveform voltage generation circuit 60 and scanning impulse and produces circuit 70.
Keep pulse-generating circuit 50 and have power recovery circuit 51, on-off element Q55, on-off element Q56 and on-off element Q59.And, produce and to keep pulse what scan electrode SC1～scan electrode SCn applied.Power recovery circuit 51 utilizes LC resonance to reclaim from panel 10 to accumulate the electric power in panel 10, and the electric power that is reclaimed is utilized as the electric power to scan electrode SC1～when scan electrode SCn drives again, offers panel 10 once more.On-off element Q55 is voltage Vs with scan electrode SC1～scan electrode SCn clamper, and on-off element Q56 is voltage 0 (V) with scan electrode SC1～scan electrode SCn clamper.On-off element Q59 is a separating switch, in order to prevent that electric current from carrying out adverse current via the parasitic diode of the on-off element that constitutes scan electrode driving circuit 43 etc. and being provided with.
Scanning impulse produces the power supply that circuit 70 has on-off element Q71H1～on-off element Q71Hn, on-off element Q71L1～on-off element Q71Ln, on-off element Q72, negative voltage Va, the power supply E71 that produces voltage VC.And; Scanning impulse is produced reference potential (current potential of node A shown in Figure 6) the superimposed voltage VC of circuit 70 and produces voltage (Vc=VC+Va), produce scanning impulse through voltage Va and voltage Vc are switched and impose on scan electrode SC1～scan electrode SCn.If voltage Va=-200 (V) for example, voltage VC=220 (V), then voltage Vc=20 (V).And, scan electrode SC1～scan electrode SCn is applied scanning impulse with timing shown in Figure 3 respectively successively.In addition, scanning impulse produces circuit 70 and during keeping, directly exports the output voltage of keeping pulse-generating circuit 50.That is, the voltage of node A is exported to scan electrode SC1～scan electrode SCn.
Tilt waveform voltage generation circuit 60 possesses Miller integrator 61, Miller integrator 62, Miller integrator 63, produces tilt waveform voltage shown in Figure 3.Miller integrator 61 has transistor Q61, capacitor C61 and resistance R 61; Through input terminal IN61 being applied fixing voltage (between two circles that are illustrated as input terminal IN61, giving fixing voltage difference), produce the waveform voltage that is inclined upwardly that gently rises towards voltage Vi2.Miller integrator 62 has the diode D62 that transistor Q62, capacitor C62, resistance R 62 and anti-adverse current are used; Through input terminal IN62 being applied fixing voltage (between two circles that are illustrated as input terminal IN62, giving fixing voltage difference), thereby produce the waveform voltage that is inclined upwardly that gently rises towards voltage Vr.Miller integrator 63 has transistor Q63, capacitor C63 and resistance R 63; Through input terminal IN63 being applied fixing voltage (to giving fixing voltage difference between two circles that are illustrated as input terminal IN63), thereby produce the downward-sloping waveform voltage that gently reduces towards voltage Vi4.In addition, on-off element Q69 is a separating switch, in order to prevent that electric current from carrying out adverse current via the parasitic diode of the on-off element that constitutes scan electrode driving circuit 43 etc. and being set up.
In addition, these on-off elements and transistor can adopt general known semiconductor elements such as MOSFET or IGBT to constitute.In addition, these on-off elements and transistor are through by timing generation circuit 45 produced with each on-off element and the corresponding timing signal of transistor and Be Controlled.
Fig. 7 is the circuit diagram of keeping electrode drive circuit 44 of the plasma display system 40 in the embodiment of the present invention.Keep electrode drive circuit 44 and possess pulse-generating circuit of keeping 80 and constant voltage generation circuit 85.
Keep pulse-generating circuit 80 and have power recovery circuit 81, on-off element Q83 and on-off element Q84.And, produce keeping the pulse of keeping that electrode SU1～keep electrode SUn applies.Power recovery circuit 81 utilizes LC resonance to reclaim from panel 10 to accumulate in the electric power of panel 10, and the electric power that is reclaimed is utilized as the electric power when keeping electrode SU1～keep electrode Sun and drive again, offers panel 10 once more.It is voltage Vs that on-off element Q83 will keep electrode SU1～keep electrode Sun clamper, and it is voltage 0 (V) that on-off element Q84 will keep electrode SU1～keep electrode SUn clamper.
Constant voltage produces circuit 85 and has on-off element Q86, on-off element Q87, to keeping electrode SU1～keep electrode Sun to apply voltage Ve.
In addition, these on-off elements also can adopt general known elements such as MOSFET or IGBT to constitute.In addition, these on-off elements are also through the Be Controlled with the corresponding timing signal of each on-off element by timing generation circuit 45 produced.
Next; Adopt scan electrode driving circuit 43 shown in Figure 6 and the electrode drive circuit 44 of keeping shown in Figure 7; During the initialization of the son (for example son SF2) of selecting initialization action, produce scan electrode SC1～scan electrode SCn and the method for keeping the driving voltage waveform that electrode SU1～keep electrode SUn applies describes.In addition, voltage Vr is set to the voltage identical with voltage Vs.
When keeping electrode SU1～keep electrode Sun and apply voltage 0 (V), the on-off element Q84 (following note is done " connection ") of electrode drive circuit 44 is kept in conducting.
Scan electrode SC1～scan electrode SCn is being applied being inclined upwardly during waveform voltage till gently rising to voltage Vr; On-off element Q71L1～on-off element the Q71Ln and the on-off element Q69 of scan electrode driving circuit 43 are connected, input terminal IN62 is applied fixing voltage (between two circles that are illustrated as input terminal IN62, fixing voltage difference being provided) and makes Miller integrator 62 work.
Scan electrode SC1～scan electrode SCn is being applied from voltage 0 (V) during towards downward-sloping waveform voltage that voltage Vi4 gently descends; The voltage (voltage difference between two circles that will be illustrated as input terminal IN62 is made as 0 (V)) that the input terminal IN62 of Miller integrator 62 is applied 0 (V) cuts off transistor Q62 (following note is done " disconnection "); On-off element Q56 is connected, scan electrode SC1～scan electrode SCn is applied voltage 0 (V).Afterwards, on-off element Q56, on-off element Q69 are broken off, input terminal IN63 is applied fixing voltage (between two circles that are illustrated as input terminal IN63, fixing voltage difference being provided) and makes Miller integrator 63 work.
When scan electrode SC1～scan electrode SCn is applied the square waveform voltage of voltage Vr; The input terminal IN63 of Miller integrator 63 is applied the voltage (voltage difference of establishing between two circles that are illustrated as input terminal IN63 is 0 (V)) of 0 (V) and makes transistor Q63 be in disconnection, make on-off element Q69, on-off element Q59, on-off element Q55 be in connection.Thus, scan electrode SC1～scan electrode SCn is applied voltage Vs, is voltage Vr.During time T e, continue this state.
When keeping electrode SU1～keep electrode Sun and apply voltage Ve, make the on-off element Q84 that keeps electrode drive circuit 44 be in disconnection, make on-off element Q86, on-off element Q87 be in connection.Thus, to keeping electrode SU1～keep electrode Sun to apply voltage Ve.
Scan electrode SC1～scan electrode SCn is being applied from voltage 0 (V) during towards downward-sloping waveform voltage that voltage Vi4 slowly descends; The transistor Q62 that the input terminal IN62 of Miller integrator 62 is applied the voltage (voltage difference of establishing between two circles that are illustrated as input terminal IN62 is 0 (V)) of 0 (V) is in to be ended; Make on-off element Q56 be in connection, scan electrode SC1～scan electrode SCn is applied voltage 0 (V).And; Make on-off element Q56, on-off element Q69 be in disconnection, the input terminal IN63 of Miller integrator 63 is applied fixing voltage (between two circles that are illustrated as input terminal IN63, fixing voltage difference being provided) and makes Miller integrator 63 work.
In addition, also can just reach and make the on-off element Q86, the on-off element Q87 that keep electrode drive circuit 44 be in disconnection before the voltage Vi4, establish and keep electrode SU1～keep electrode Sun and be in high impedance status at the voltage of scan electrode SC1～scan electrode SCn.Drive through as above that kind, thereby ensuing write activity is more stably produced.This driving voltage waveform of expression among Fig. 3.Perhaps also can be to make to keep electrode SU1～keep electrode Sun and be not in high impedance status, and to keeping electrode SU1～the keep structure that electrode Sun continues to apply voltage Ve.
In addition, Fig. 5～driving circuit shown in Figure 7 is an example, and the present invention is not limited to the circuit structure of these driving circuits.
In addition, the example that the concrete numerical value shown in the embodiment of the present invention etc. is only enumerated, the present invention is not limited to any of these numerical value.Preferred each numerical value suitably is set at optimum value according to the characteristic of panel or the specification of plasma display system etc.
[utilizability on the industry]
The present invention be as guaranteeing sufficient voltage setting range and produce the stable discharge that writes, and the driving method and the plasma display system of the panel that can show the high image of display quality are useful.
[symbol description]
10 panels
21 front substrates
22 scan electrodes
23 keep electrode
24 show electrodes are right
25 dielectric layers
26 protective seams
31 back substrates
32 data electrodes
33 dielectric layers
34 next doors
35 luminescent coatings
40 plasma display systems
41 imaging signal processing circuits
42 data electrode driver circuits
43 scan electrode driving circuits
44 keep electrode drive circuit
45 timing generation circuits
50,80 keep pulse-generating circuit
51,81 power recovery circuits
60 tilt waveform voltage generation circuits
61,62,63 Miller integrators
70 scanning impulses produce circuit
85 constant voltages produce circuit
Q55, Q56, Q59, Q69, Q71H1～Q71Hn, Q71L1～Q71Ln, Q72, Q83, Q84, Q86, Q87 on-off element
The E71 power supply
Q61, Q62, Q63 transistor
C61, C62, C63 capacitor
R61, R62, R63 resistance
IN61, IN62, IN63 input terminal
The D62 diode
Claims (4)
1. the driving method of a Plasmia indicating panel; Adopt a plurality of have an initialization during, write during and keep during the son field constitute a field; Plasmia indicating panel to possessing a plurality of discharge cells drives; This discharge cell has scan electrode, keeps electrode and data electrode, and the driving method of this plasma display panel is characterised in that
During the initialization of above-mentioned son field; Force initialization action or select any initialization action in the initialization action; Wherein how the action of the son of this pressure initialization action before just all makes above-mentioned discharge cell produce the initialization discharge; This selection initialization action only makes and has produced the discharge cell that writes discharge during the writing of son before just and optionally produce the initialization discharge
In above-mentioned selection initialization action, the above-mentioned electrode of keeping is applied the 1st voltage, and above-mentioned scan electrode is applied the waveform voltage that is inclined upwardly, producing with the above-mentioned electrode of keeping is that negative electrode, above-mentioned scan electrode are the discharge first time of anode; Then, above-mentioned scan electrode is applied downward-sloping waveform voltage, producing with above-mentioned scan electrode is that negative electrode, above-mentioned data electrode are the discharge second time of anode; Then, above-mentioned scan electrode is applied positive square waveform voltage, producing with the above-mentioned electrode of keeping is that negative electrode, above-mentioned scan electrode are the discharge for the third time of anode; Then, the above-mentioned electrode of keeping is applied 2nd voltage higher than the 1st voltage, and above-mentioned scan electrode is applied downward-sloping waveform voltage, producing with above-mentioned scan electrode is that negative electrode, above-mentioned data electrode are the 4th discharge of anode, and
The number of keeping pulse that is produced during the keeping of son before being based on just changes the time span that above-mentioned scan electrode is applied above-mentioned positive square waveform voltage.
2. the driving method of Plasmia indicating panel according to claim 1 is characterized in that,
Hour compare with the number of keeping pulse that is produced during the keeping of son before just; When the number of keeping pulse that is produced during the keeping of the son before just was big, the time span that above-mentioned scan electrode is applied above-mentioned positive square waveform voltage was longer.
3. plasma display system, possess: possess the Plasmia indicating panel of a plurality of discharge cells, this discharge cell has scan electrode, keeps electrode and data electrode; With
Adopt a plurality of have an initialization during, write during and keep during son constitute a field and come driving circuit that above-mentioned Plasmia indicating panel is driven, this plasma display device to be characterised in that,
Above-mentioned driving circuit,
During the initialization of above-mentioned son field; Force initialization action or select any initialization action in the initialization action; How the action of the son of this pressure initialization action before just all makes above-mentioned discharge cell produce the initialization discharge; This selection initialization action only makes and has produced the discharge cell that writes discharge during the writing of son before just and optionally produce the initialization discharge
In above-mentioned selection initialization action, the above-mentioned electrode of keeping is applied the 1st voltage, and above-mentioned scan electrode is applied the waveform voltage that is inclined upwardly, producing with the above-mentioned electrode of keeping is that negative electrode, above-mentioned scan electrode are the discharge first time of anode; Then, above-mentioned scan electrode is applied downward-sloping waveform voltage, producing with above-mentioned scan electrode is that negative electrode, above-mentioned data electrode are the discharge second time of anode; Then, above-mentioned scan electrode is applied positive square waveform voltage, producing with the above-mentioned electrode of keeping is that negative electrode, above-mentioned scan electrode are the discharge for the third time of anode; Then, the above-mentioned electrode of keeping is applied 2nd voltage higher than the 1st voltage, and above-mentioned scan electrode is applied downward-sloping waveform voltage, producing with above-mentioned scan electrode is that negative electrode, above-mentioned data electrode are the 4th discharge of anode, and
The number of keeping pulse that is produced during the keeping of son before being based on just changes the time span that above-mentioned scan electrode is applied above-mentioned positive square waveform voltage.
4. plasma display system according to claim 3 is characterized in that,
Above-mentioned driving circuit will be set as follows the time span that above-mentioned scan electrode applies above-mentioned positive square waveform voltage: promptly with the keeping of son before just during the number of keeping pulse that produced hour compare, longer when the number of keeping pulse that is produced during the keeping of the son field before just is big.
Applications Claiming Priority (3)
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| JP2009251692 | 2009-11-02 | ||
| JP2009-251692 | 2009-11-02 | ||
| PCT/JP2010/006392 WO2011052219A1 (en) | 2009-11-02 | 2010-10-29 | Plasma display panel driving method and plasma display device |
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| CN102598099A true CN102598099A (en) | 2012-07-18 |
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| US (1) | US20120218240A1 (en) |
| JP (1) | JPWO2011052219A1 (en) |
| KR (1) | KR20120053532A (en) |
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- 2010-10-29 KR KR1020127009759A patent/KR20120053532A/en not_active Application Discontinuation
- 2010-10-29 JP JP2011538262A patent/JPWO2011052219A1/en active Pending
- 2010-10-29 US US13/505,696 patent/US20120218240A1/en not_active Abandoned
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| US20120218240A1 (en) | 2012-08-30 |
| JPWO2011052219A1 (en) | 2013-03-14 |
| WO2011052219A1 (en) | 2011-05-05 |
| KR20120053532A (en) | 2012-05-25 |
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